Coding for beginners - this is how Steve started

[garyfritz]

Thank for that explanation. The "second one runs all the start() code on every tick" seems to give the closest backtest results to forward testing.

No, because these "infinite loop" EAs generally process multiple pairs, and Empty4 cannot backtest them. They are for realtime forward testing/trading only.

[jjasper7]

i am trying to modify some code in simpleshelley, but suspect i am having some array problems that i do not understand. i have inserted alerts (ss3 and ss4) that print proper values for TradePair[][4] as it is being saved, but the printout of alert(ss4) shows only the last movingaverage calculated is saved for ALL instances of TradePair[cc][4] somehow!! i do not understand, can someone please explain what is happening?

code:
string TradePair[][4]; //jj

void ReadTable()
{
//Fills the array table
int cc = 0;
double v = 0;
string symbol;

//jj set TradePair[cc][1] = buyhold; TradePair[cc][2] = buy
for (cc = 0; cc < NoOfPairs; cc++)
{
TradePair[cc][3]=" "; //jj
TradePair[cc][4]=" "; //jj
symbol = TradePair[cc][0];
Comment(Gap, "Reading the indicators: " + symbol);
//Trading time frame Slope

//jj
int xx,ltp;
int lt=Period();
int ltp=240;

double Slope = GetSlope(symbol,ltp, 0); //jj current slope !d1
TradePair[cc][3]=DoubleToStr(Slope,2); //jj
TradePair[cc][1] = nottradable;
if (Slope >= 0.4) TradePair[cc][1] = buyhold;
if (Slope <= -0.4) TradePair[cc][1] = sellhold;

// market direction
double wo = iMA(symbol,ltp,5,1,MODE_LWMA,PRICE_OPEN,0); //jj h4 !w1
double ma = iMA(symbol,lt,1,0,MODE_SMA,PRICE_MEDIAN,0); //jj current price
double oma = iMA(symbol,lt,3,0,MODE_SMA,PRICE_MEDIAN,1); //jj past price
TradePair[cc][2] = none;
TradePair[cc][4]=DoubleToStr(ma,5); //jj

Alert( "SS3 ",TradePair[cc][0]," ma",TradePair[cc][3]," a",TradePair[cc][4]," cc",cc); //jj
if (ma > wo && ma>oma) TradePair[cc][2] = buy; //jj add direction
if (ma < wo && ma<oma) TradePair[cc][2] = sell; //jj

}//for (cc = 0 ; cc < ArraySize(TradePair); cc++)

Alert("SS2 ",TradePair[0][0]," table calc, ma=", TradePair[0][4]," ", TradePair[1][4]," ", TradePair[2][4]); //jj
}//End void ReadTable()

[jjasper7]

the tma slope calculation i get from simpleshelley and from 10.2 tma slope are very different. is there something wrong or is one of them just off in magnitude? i guess the basic question is do they cross zero at about the same time, and the +/- .8 mark need adjustment in shelley?

[NeoTrader]

hi jjasper,

the tma slope calculation i get from simpleshelley and from 10.2 tma slope are very different. is there something wrong or is one of them just off in magnitude? i guess the basic question is do they cross zero at about the same time, and the +/- .8 mark need adjustment in shelley?

Just did a quick peek in simple shelley v1b code and the tma code is the standard (repainting) TMA Code. It should be the same value as you see on the standard TMAslope. Have you changed any settings in your slope or are you using a version with TMATrue calculations?

happy trading,

NeoTrader

-

[fxozgirl]

Hey guys.

I see a number of people here wanting to get more involved with coding. This sounds like An Excellent Plan to me.

Attached is the stuff I used to get started. The contents of the zip are freely available on the net, so I am sure CodersGuru will not mind.

This entire forum, and every piece of software I have ever coded for Forex trading has its origins in info provided by the lessons in the zipfile.

My/our warmest appreciation to CodersGuru.

Have fun guys. I do.

Ok, I've decided to dip a toe in the water here and start to learn some coding. Time is my biggest enemy, so will most likely be slow going.

Thanks Steve for sharing how you started

[SteveHopwood]

Hey guys.

I see a number of people here wanting to get more involved with coding. This sounds like An Excellent Plan to me.

Attached is the stuff I used to get started. The contents of the zip are freely available on the net, so I am sure CodersGuru will not mind.

This entire forum, and every piece of software I have ever coded for Forex trading has its origins in info provided by the lessons in the zipfile.

My/our warmest appreciation to CodersGuru.

Have fun guys. I do.

Ok, I've decided to dip a toe in the water here and start to learn some coding. Time is my biggest enemy, so will most likely be slow going.

Thanks Steve for sharing how you started

Go for it, Tiger.

[jjasper7]

thanks neo, so i guess that means i am using the wrong tma indi. which is the proper one?
also, do you have any ideas that might account for my TradePair[x][4] printout not containing the expected calculated values after exiting the loop?

[SteveHopwood]

thanks neo, so i guess that means i am using the wrong tma indi. which is the proper one?
also, do you have any ideas that might account for my TradePair[x][4] printout not containing the expected calculated values after exiting the loop?

Not sure if this helps with your issue, but you might like to go to any of my recent EA's that use Slope and pinch the GetSlope code from there. The code was provided by Baluda, who understands this stuff, and cuts out all the iCustom calls otherwise involved.

Sorry if I am barking at the wrong moon here.

[jjasper7]

yea i think the tma code is in shelley and from baluda, and the tma indi i was comparing it against was not the most recent/corrected version. but there are so many instances floating around that i am unclear which is the best stand-alone version to use and that displays the correct recent value. also am assuming the values look alike except in magnitude so am using the one as in the ss code. the outstanding question, though, is still about the array in my code snippet. proper values are stored away and displayed by the ss3 alert, but after the looping is done, the ss2 alert shows that the values for the 4th element of the array was not saved as intended, and i do not see what i did wrong. that 4th element for each instance of the array, contains the same value as last calculated or at least does not contain the value that was calculated for it and gets/displays only the last calculated value.

[traderduke]

Gary
with the "run once per candle" removed from the Start(), I'm getting multiple entries in one candle, see the attached. This happens when the "trailing stop" or "take profit" is smaller then the RENKO block.

What is the code for limiting one trade per candle??

Thank you for all your help!

Thank for that explanation. The "second one runs all the start() code on every tick" seems to give the closest backtest results to forward testing.

No, because these "infinite loop" EAs generally process multiple pairs, and Empty4 cannot backtest them. They are for realtime forward testing/trading only.